71908 FE/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71908 FE/P4ADBA Bearing Product Overview & Core Advantages
The 71908 FE/P4ADBA is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement bearing set is preloaded to Extra light (Class A) specifications, ensuring minimal axial and radial play for superior performance in high-precision machinery. Its P4A tolerance class guarantees extremely tight dimensional and running accuracy, making it ideal for spindle applications and other demanding scenarios where high rigidity and stability under combined loads are critical.
71908 FE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| FE | Indicates a specific internal design and preload specification. |
| P4A | Denotes a high-precision tolerance class with enhanced running accuracy requirements. |
| DB | Signifies the bearings are supplied as a Duplex Back-to-Back matched set. |
| A | Specifies the Extra light preload grade applied to the matched set. |
71908 FE/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads, providing exceptional shaft positioning accuracy and system stability.
Precision Performance: Manufactured to P4A tolerance class standards, this bearing ensures minimal runout and vibration, which is crucial for high-speed applications and maintaining machining quality.
Optimized for Combined Loads: With a 18° contact angle, the bearing is engineered to handle significant axial loads in addition to radial loads, making it suitable for complex loading conditions.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly at high rotational speeds, contributing to the bearing's limiting speed of 41,000 rpm.
Durable Construction: Manufactured from chrome steel for both rings and balls, the bearing provides high fatigue resistance and long service life under demanding operating conditions.
71908 FE/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring minimal deflection and high rotational accuracy.
- Precision Gearboxes: Applications demanding exact shaft positioning and high rigidity.
- High-Speed Motors: Spindle motors and other high-RPM applications where stability is paramount.
- Robotic Systems: Precision joints and rotary axes requiring high stiffness and accuracy.
- Medical Equipment: High-speed dental handpieces and laboratory automation equipment.
